Make v8::Handle as "deprecated soon"

src/extensions/gc-extension.h

Index: src/extensions/gc-extension.h
diff --git a/src/extensions/gc-extension.h b/src/extensions/gc-extension.h
index 789354597e5ffdea6b1124274ede4b3e40b1c732..2462bd9604773aee8829a551efbae17e88e45bf1 100644
--- a/src/extensions/gc-extension.h
+++ b/src/extensions/gc-extension.h
@@ -15,9 +15,8 @@ class GCExtension : public v8::Extension {
   explicit GCExtension(const char* fun_name)
       : v8::Extension("v8/gc",
                       BuildSource(buffer_, sizeof(buffer_), fun_name)) {}
-  virtual v8::Handle<v8::FunctionTemplate> GetNativeFunctionTemplate(
-      v8::Isolate* isolate,
-      v8::Handle<v8::String> name);
+  virtual v8::Local<v8::FunctionTemplate> GetNativeFunctionTemplate(
+      v8::Isolate* isolate, v8::Local<v8::String> name);
   static void GC(const v8::FunctionCallbackInfo<v8::Value>& args);
 
  private: